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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-04 13:13:40 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-04 20:19:39 -0400
commit4091fd942e96af5a0b1dfa6aac5f44153ebf7cdb (patch)
tree0455a439ad1a9884018286670e49c4e18cfaa359 /drivers/scsi/mpt2sas/mpi/mpi2_raid.h
parent73b29505c36eeb4751eccad41f6aad78562521f8 (diff)
ipc: move the rcu_read_lock() from sem_lock_and_putref() into callers
This is another ipc semaphore locking cleanup, trying to make the locking more straightforward. We move the rcu read locking into the callers of sem_lock_and_putref(), which in general means that we now mostly do the rcu_read_lock() and rcu_read_unlock() in the same function. Mostly. We still have the ipc_addid/newary/freeary mess, and things like ipcctl_pre_down_nolock(). Acked-by: Davidlohr Bueso <davidlohr.bueso@hp.com> Cc: Rik van Riel <riel@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/scsi/mpt2sas/mpi/mpi2_raid.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-22 12:41:54 -0400
class="hl com">/* header file for DIO boards for the HP300 architecture. * Maybe this should handle DIO-II later? * The general structure of this is vaguely based on how * the Amiga port handles Zorro boards. * Copyright (C) Peter Maydell 05/1998 <pmaydell@chiark.greenend.org.uk> * Converted to driver model Jochen Friedrich <jochen@scram.de> * * The board IDs are from the NetBSD kernel, which for once provided * helpful comments... * * This goes with drivers/dio/dio.c */ #ifndef _LINUX_DIO_H #define _LINUX_DIO_H /* The DIO boards in a system are distinguished by 'select codes' which * range from 0-63 (DIO) and 132-255 (DIO-II). * The DIO board with select code sc is located at physical address * 0x600000 + sc * 0x10000 * So DIO cards cover [0x600000-0x800000); the areas [0x200000-0x400000) and * [0x800000-0x1000000) are for additional space required by things * like framebuffers. [0x400000-0x600000) is for miscellaneous internal I/O. * On Linux, this is currently all mapped into the virtual address space * at 0xf0000000 on bootup. * DIO-II boards are at 0x1000000 + (sc - 132) * 0x400000 * which is address range [0x1000000-0x20000000) -- too big to map completely, * so currently we just don't handle DIO-II boards. It wouldn't be hard to * do with ioremap() though. */ #include <linux/device.h> #ifdef __KERNEL__ #include <asm/hp300hw.h> typedef __u16 dio_id; /* * DIO devices */ struct dio_dev { struct dio_bus *bus; dio_id id; int scode; struct dio_driver *driver; /* which driver has allocated this device */ struct device dev; /* Generic device interface */ u8 ipl; char name[64]; struct resource resource; }; #define to_dio_dev(n) container_of(n, struct dio_dev, dev) /* * DIO bus */ struct dio_bus { struct list_head devices; /* list of devices on this bus */ unsigned int num_resources; /* number of resources */ struct resource resources[2]; /* address space routed to this bus */ struct device dev; char name[10]; }; extern struct dio_bus dio_bus; /* Single DIO bus */ extern struct bus_type dio_bus_type; /* * DIO device IDs */ struct dio_device_id { dio_id id; /* Device ID or DIO_WILDCARD */ unsigned long driver_data; /* Data private to the driver */ }; /* * DIO device drivers */ struct dio_driver { struct list_head node; char *name; const struct dio_device_id *id_table; /* NULL if wants all devices */ int (*probe)(struct dio_dev *z, const struct dio_device_id *id); /* New device inserted */ void (*remove)(struct dio_dev *z); /* Device removed (NULL if not a hot-plug capable driver) */ struct device_driver driver; }; #define to_dio_driver(drv) container_of(drv, struct dio_driver, driver) /* DIO/DIO-II boards all have the following 8bit registers. * These are offsets from the base of the device. */ #define DIO_IDOFF 0x01 /* primary device ID */ #define DIO_IPLOFF 0x03 /* interrupt priority level */ #define DIO_SECIDOFF 0x15 /* secondary device ID */ #define DIOII_SIZEOFF 0x101 /* device size, DIO-II only */ #define DIO_VIRADDRBASE 0xf0000000UL /* vir addr where IOspace is mapped */ #define DIO_BASE 0x600000 /* start of DIO space */ #define DIO_END 0x1000000 /* end of DIO space */ #define DIO_DEVSIZE 0x10000 /* size of a DIO device */ #define DIOII_BASE 0x01000000 /* start of DIO-II space */ #define DIOII_END 0x20000000 /* end of DIO-II space */ #define DIOII_DEVSIZE 0x00400000 /* size of a DIO-II device */ /* Highest valid select code. If we add DIO-II support this should become * 256 for everything except HP320, which only has DIO. */ #define DIO_SCMAX (hp300_model == HP_320 ? 32 : 256) #define DIOII_SCBASE 132 /* lowest DIO-II select code */ #define DIO_SCINHOLE(scode) (((scode) >= 32) && ((scode) < DIOII_SCBASE)) #define DIO_ISDIOII(scode) ((scode) >= 132 && (scode) < 256) /* macros to read device IDs, given base address */ #define DIO_ID(baseaddr) in_8((baseaddr) + DIO_IDOFF) #define DIO_SECID(baseaddr) in_8((baseaddr) + DIO_SECIDOFF) /* extract the interrupt level */ #define DIO_IPL(baseaddr) (((in_8((baseaddr) + DIO_IPLOFF) >> 4) & 0x03) + 3) /* find the size of a DIO-II board's address space. * DIO boards are all fixed length. */ #define DIOII_SIZE(baseaddr) ((in_8((baseaddr) + DIOII_SIZEOFF) + 1) * 0x100000) /* general purpose macro for both DIO and DIO-II */ #define DIO_SIZE(scode, base) (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE) /* The hardware has primary and secondary IDs; we encode these in a single * int as PRIMARY ID & (SECONDARY ID << 8). * In practice this is only important for framebuffers, * and everybody else just sets ID fields equal to the DIO_ID_FOO value. */ #define DIO_ENCODE_ID(pr,sec) ((((int)sec & 0xff) << 8) | ((int)pr & 0xff)) /* macro to determine whether a given primary ID requires a secondary ID byte */ #define DIO_NEEDSSECID(id) ((id) == DIO_ID_FBUFFER) #define DIO_WILDCARD 0xff /* Now a whole slew of macros giving device IDs and descriptive strings: */ #define DIO_ID_DCA0 0x02 /* 98644A serial */ #define DIO_DESC_DCA0 "98644A DCA0 serial" #define DIO_ID_DCA0REM 0x82 /* 98644A serial */ #define DIO_DESC_DCA0REM "98644A DCA0REM serial" #define DIO_ID_DCA1 0x42 /* 98644A serial */ #define DIO_DESC_DCA1 "98644A DCA1 serial" #define DIO_ID_DCA1REM 0xc2 /* 98644A serial */ #define DIO_DESC_DCA1REM "98644A DCA1REM serial" #define DIO_ID_DCM 0x05 /* 98642A serial MUX */ #define DIO_DESC_DCM "98642A DCM serial MUX" #define DIO_ID_DCMREM 0x85 /* 98642A serial MUX */ #define DIO_DESC_DCMREM "98642A DCMREM serial MUX" #define DIO_ID_LAN 0x15 /* 98643A LAN */ #define DIO_DESC_LAN "98643A LANCE ethernet" #define DIO_ID_FHPIB 0x08 /* 98625A/98625B fast HP-IB */ #define DIO_DESC_FHPIB "98625A/98625B fast HPIB" #define DIO_ID_NHPIB 0x01 /* 98624A HP-IB (normal ie slow) */ #define DIO_DESC_NHPIB "98624A HPIB" #define DIO_ID_SCSI0 0x07 /* 98265A SCSI */ #define DIO_DESC_SCSI0 "98265A SCSI0" #define DIO_ID_SCSI1 0x27 /* ditto */ #define DIO_DESC_SCSI1 "98265A SCSI1" #define DIO_ID_SCSI2 0x47 /* ditto */ #define DIO_DESC_SCSI2 "98265A SCSI2" #define DIO_ID_SCSI3 0x67 /* ditto */ #define DIO_DESC_SCSI3 "98265A SCSI3" #define DIO_ID_FBUFFER 0x39 /* framebuffer: flavour is distinguished by secondary ID */ #define DIO_DESC_FBUFFER "bitmapped display" /* the NetBSD kernel source is a bit unsure as to what these next IDs actually do :-> */ #define DIO_ID_MISC0 0x03 /* 98622A */ #define DIO_DESC_MISC0 "98622A" #define DIO_ID_MISC1 0x04 /* 98623A */ #define DIO_DESC_MISC1 "98623A" #define DIO_ID_PARALLEL 0x06 /* internal parallel */ #define DIO_DESC_PARALLEL "internal parallel" #define DIO_ID_MISC2 0x09 /* 98287A keyboard */ #define DIO_DESC_MISC2 "98287A keyboard" #define DIO_ID_MISC3 0x0a /* HP98635A FP accelerator */ #define DIO_DESC_MISC3 "HP98635A FP accelerator" #define DIO_ID_MISC4 0x0b /* timer */ #define DIO_DESC_MISC4 "timer" #define DIO_ID_MISC5 0x12 /* 98640A */ #define DIO_DESC_MISC5 "98640A" #define DIO_ID_MISC6 0x16 /* 98659A */ #define DIO_DESC_MISC6 "98659A" #define DIO_ID_MISC7 0x19 /* 237 display */ #define DIO_DESC_MISC7 "237 display" #define DIO_ID_MISC8 0x1a /* quad-wide card */ #define DIO_DESC_MISC8 "quad-wide card" #define DIO_ID_MISC9 0x1b /* 98253A */ #define DIO_DESC_MISC9 "98253A" #define DIO_ID_MISC10 0x1c /* 98627A */ #define DIO_DESC_MISC10 "98253A" #define DIO_ID_MISC11 0x1d /* 98633A */ #define DIO_DESC_MISC11 "98633A" #define DIO_ID_MISC12 0x1e /* 98259A */ #define DIO_DESC_MISC12 "98259A" #define DIO_ID_MISC13 0x1f /* 8741 */ #define DIO_DESC_MISC13 "8741" #define DIO_ID_VME 0x31 /* 98577A VME adapter */ #define DIO_DESC_VME "98577A VME adapter" #define DIO_ID_DCL 0x34 /* 98628A serial */ #define DIO_DESC_DCL "98628A DCL serial" #define DIO_ID_DCLREM 0xb4 /* 98628A serial */ #define DIO_DESC_DCLREM "98628A DCLREM serial" /* These are the secondary IDs for the framebuffers */ #define DIO_ID2_GATORBOX 0x01 /* 98700/98710 "gatorbox" */ #define DIO_DESC2_GATORBOX "98700/98710 \"gatorbox\" display" #define DIO_ID2_TOPCAT 0x02 /* 98544/98545/98547 "topcat" */ #define DIO_DESC2_TOPCAT "98544/98545/98547 \"topcat\" display" #define DIO_ID2_RENAISSANCE 0x04 /* 98720/98721 "renaissance" */ #define DIO_DESC2_RENAISSANCE "98720/98721 \"renaissance\" display" #define DIO_ID2_LRCATSEYE 0x05 /* lowres "catseye" */ #define DIO_DESC2_LRCATSEYE "low-res catseye display" #define DIO_ID2_HRCCATSEYE 0x06 /* highres colour "catseye" */ #define DIO_DESC2_HRCCATSEYE "high-res color catseye display" #define DIO_ID2_HRMCATSEYE 0x07 /* highres mono "catseye" */ #define DIO_DESC2_HRMCATSEYE "high-res mono catseye display" #define DIO_ID2_DAVINCI 0x08 /* 98730/98731 "davinci" */ #define DIO_DESC2_DAVINCI "98730/98731 \"davinci\" display" #define DIO_ID2_XXXCATSEYE 0x09 /* "catseye" */ #define DIO_DESC2_XXXCATSEYE "catseye display" #define DIO_ID2_HYPERION 0x0e /* A1096A "hyperion" */